Splitting bills in a share house without the spreadsheet wars

Pick a system — and resist the clever one

There are three workable systems. Most houses should take the first and spend their sophistication on rent instead.

• Even split of everything ongoing (energy, internet, water usage, streaming). Least admin, fewest arguments, right answer for most houses.
• Usage-weighted splits — the person with the heater habit pays more. Sounds fair, requires surveillance, breeds auditors. Almost never worth it.
• Rotation by account — each housemate owns one bill entirely (you: internet; them: energy). Zero arithmetic, natural spread of responsibility; just size the accounts roughly evenly.

Unfairness belongs in the rent, not the bills

If one room is twice the size with an ensuite, don't try to rebalance the ledger through the gas bill — weight the rent and keep bills flat and simple. Our rent split calculator does the weighting (size, ensuite, extras) and gives every housemate a share that adds back to the exact total, with a link you can drop in the group chat.

Whose name is on the account matters

The account holder isn't doing paperwork — they're carrying real risk. The bill lands on their credit file if it goes unpaid, and they're the one chasing everyone else. Two rules keep this fair:

• Spread the accounts: one per person, nobody holds them all. The person holding every account is one bad month from being the house's unpaid debt collector.
• When the account holder moves out, transfer or close their accounts the same week. "I'll sort it later" is how someone pays for a house they left in autumn.

Mechanics that prevent the chase

• Fix a money day. Bills screenshot into the group chat when they arrive; everyone pays their share within 48 hours. The norm does the chasing, not a person.
• Or go one step further: a shared bills account everyone auto-transfers into weekly, and every account debits from it. Set-and-forget, easiest to unwind at moveout.
• Split-tracking apps work if everyone actually opens them; the group chat plus bank transfers works because everyone already does.
• Keep the thread. A year of screenshots and "paid ✓" messages is the house's accounting system, and it's admissible in any household argument.

One-off and lumpy costs

• The rule that prevents 90-dollar arguments: agree who's in before the purchase, not after. "I bought us a blender" is a gift; "let's buy a blender" is a split.
• A small house kitty (cash tin or shared account) for staples — oil, cleaning products, bin bags — beats itemising a $6 sponge.
• Jointly bought furniture needs an exit plan at purchase time: who keeps the couch, and what do they pay the others when someone leaves?
• Repairs and replacements for house-owned things: split by whoever's on the lease unless you've agreed otherwise in writing.

Moving in, moving out

• Day one and final day: photograph the meters. Two photos end every "but I wasn't living there in July" dispute forever.
• Departing housemates pay their share of bills up to their last day — pro-rata by days, settled from the final bills, not guessed in advance.
• Internet contracts outlive tenancies. Check the exit or transfer fee before the account holder gives notice.
• The bond is not a bills account. Nothing comes out of a bond without a written agreement — bills get settled as bills.

Write it down once

Every system above fits in three sentences: what's split, how it's split, when it's paid. Those three sentences belong in writing before the first bill lands — it's clause 6 of our free VIC flatmate agreement, which turns the whole arrangement (rent, bond, bills, notice) into a signed PDF in about five minutes. The houses with the fewest money fights aren't the ones with the most goodwill; they're the ones where nobody has to remember what was agreed.

Keep reading

• Rent split calculator
• Free VIC flatmate agreement (PDF)
• Housemate red flags to catch early
• Flatmate interview questions that actually work